stop start LAND ROVER FRELANDER 2 2006 Repair Manual

Inexperi enced off-road dri vers may benefi t from t he automat ic as s is tance of t he Terrai n Respons e s yst em and t he driverinformat ion. Experienced off-road drivers can s elect the specific programs for ext reme condit ions t o acces s cont rol over t hevehi cl e s yst ems (for example; accel erator pedal maps , t rans mis s ion s hift maps , traction s ett ings ) which are not access i bl eon vehicles wi thout Terrai n Res pons e.
Stop/St art Vehicl es - From 2010 MY
Acti vat ion of t he Terrai n Res pons e s peci al programs wi ll deact ivate the St op/St art syst em.
However, if Terrain Res pons e is acti vat ed when t he engi ne is shut down in a Stop/St art cycl e t he engi ne wil l aut omat ical lyres t art . If duri ng thi s event t he Stop/Start sys tem cannot detect the driver's occupancy, for example ei ther t he dri ver’ss afety bel t or door i s unlatched, the engine wi ll not res t art . The St op/St art s yst em will reques t t he driver t o depres s theclutch t o rest art t he engine. The dri ver wi ll be i nformed of t his by ‘RESTART REQUIRED PRESS CLUTCH’ being di spl ayed i nt he mes sage center.For addit ional informat ion, refer t o: Starti ng Sys t em (303-06C Starti ng Syst em - TD4 2.2L Di es el, Vehicles Bui lt From:01-03-2009, Descripti on and Operat ion).
TERRAIN RESPONSE ROTARY CONTROL AND MODULE
ItemPart NumberDescription1-Hil l Des cent Cont rol (HDC) s wi tch
2-Special programs off
3-Gras s /Gravel/Snow program4-Rot ary cont rol
5-Mud/rut s program
6-Sand program7-Dynami c Stabil it y Control (DSC) s wit ch
Each program is denoted by a s ymbol whi ch repres ent s t he t errai n encountered. The rotary cont rol wi ll only s elect the las tprogram in it s direct ion of rotat ion. Further rot ati on of the control in ei ther direct ion, once the l ast program has beens elect ed, wil l have no effect, for exampl e; once 'Sand' has been s elect ed, furt her rotat ion i n a clockwis e direct ion wil lret ain 'Sand'.
The cont rol module and rot ary cont rol i s connected vi a a harnes s connector which al so cont ains t he wiring for the HDC andDSC s wit ches and the i ll uminati on circuit s . The cont rol module and rotary cont rol uses 4 of t hes e wi res for 12V bat t erys uppl y (i gnit ion - only when the i gni ti on is on) a ground and high s peed CAN bus (pos i ti ve and negat ive).
PRINCIPLES OF OPERATION
The fol lowing vehicl e s ub-s ys t em control modul es are us ed for t he Terrain Res pons e sys tem:
Engi ne management - Engine Cont rol Module (ECM)Trans mis s ion control - Transmis s ion Control Modul e (TCM) (automat ic t rans mi ss ion only)Acti ve on-demand coupli ng cont rol moduleBrake s ys tem - Anti -l ock Brake Sys t em (ABS)/Dynami c Stabil it y Control (DSC)/Electroni c Tracti on Control (ETC)/ Hi llDes cent Control (HDC) - ABS module

1-Vacuum pi pe - i 6 engi ne
2-Vacuum pump - i6 engi ne
3-Vacuum pi pe - TD4 engine (up t o 2010 MY )4-Vacuum pump - TD4 engine
5-Check valve
6-Brake boost er
OVERVIEW
Power as s is t ance for the braki ng s ys t em i s provided by a vacuum operat ed, non-act ive brake boos ter.
The brake boost er is a compact unit t hat occupi es les s s pace than a convent ional brake boos t er, improving t he vehi cl escras h performance charact eri st ics . The uni t is ins tall ed wi th t andem diaphragms that are 203.20 mm (8.00 in) and 228.60mm (9.00 in) i n diamet er and operate as a s ingle uni t.
The unit i s located on t he driver's si de of the engine compartment , and is s ealed t o t he bulkhead wit h a gas ket ands ecured wit h 4 s t uds and locki ng nuts . The brake boost er act uati ng pus h rod i s att ached t o t he brake pedal wit h a clevispin. The boost er out put rod l ocat es in the primary pis ton of t he brake mast er cyl inder.For addit ional informat ion, refer t o: Hydraulic Brake Actuati on (206-06 Hydraulic Brake Act uati on, Des cri pt ion andOperat ion).
VACUUM COMPONENTS
For bot h t he i6 gas oli ne and TD4 dies el engi nes , t he vacuum requi red for brake booster operati on is creat ed by a vacuumpump mount ed at the rear of t he cylinder head. The vacuum pump i s dri ven by the i ntake cams haft.
A rigi d plas ti c pipe connect s the vacuum pump t o a check valve ins t al led on the front chamber of t he brake boost er. Thepipe l engt h and rout ing is different for LHD and RHD model s.
The check valve mai ntains the vacuum neces s ary for brake boos t er operat ion and prevent s air from ent eri ng the frontchamber.
Stop/Start Vehicles - From 2010 MY
Stop/St art Vehicl e Component s
ItemPart NumberDescription
1-Brake vacuum sens or
Brake vacuum s ens or

A brake vacuum s ensor i s int roduced on Stop/St art vehicles t o moni tor vacuum res erves in the brake servo. The vacuums ens or is mount ed i n the vacuum pi pe and hardwired to the ECM.For addit ional informat ion, refer t o: Starti ng Sys t em (303-06C Starti ng Syst em - TD4 2.2L Di es el, Vehicles Bui lt From:01-03-2009, Descripti on and Operat ion).

The HDC s wi tch i s non-lat chi ng and is ins tall ed in the floor cons ole, forward of the gear s el ect or lever. Moment aril ypres s ing and releasi ng t he HDC s wit ch connects an ignit ion power feed t o t he ABS module. W it h t he fi rs t pres s and rel easeof the HDC s wit ch, t he ABS module enables operat ion of t he HDC funct ion. W hen t he HDC swi tch i s pres s ed and rel eas edagai n, the ABS modul e dis ables operat ion of t he HDC funct ion.
To prevent mis -use of, or in the event of a broken HDC s wi tch, if t he s wit ch is press ed for more t han 10 s econds nochange of s tat e occurs. A DTC i s s tored in t he ABS module memory if t he input from the HDC swi tch i s held hi gh for moret han 1 mi nut e.
HDC Activating Stoplamps
Operat ion of t he vehi cl e s toplamps during HDC is controll ed by the CJB. The ABS module monit ors t he brake s yst emhydraulic press ure and request s t he CJB, vi a t he high s peed CAN bus, t o energi ze the s t opl amps duri ng act ive braki ng.
A press ure thres hold and ti me fil ter prevents t he s topl amps from fli ckeri ng whil e HDC i s braking.
Stop/St art Vehicl es - From 2010 MY
Acti vat ion of Hi ll Descent Cont rol wi ll deact ivate the St op/St art s yst em. However, if Hi ll Des cent Control i s acti vat ed whent he engi ne is s hutdown in a St op/St art cycl e t he engi ne wil l aut omati cal ly rest art . If during t his event the St op/St arts ys t em cannot det ect t he dri ver's occupancy, for exampl e eit her t he driver’s safety belt or door is unl at ched, t he engi newil l not res tart. The St op/Start sys tem wi ll request the driver to depres s t he clut ch to res tart the engine. The dri ver wi ll beinformed of t his by ‘RESTART REQUIRED PRESS CLUTCH’ being di spl ayed i n t he mes sage center.
The dri ver mus t respond t o t hi s reques t wit hin a li mit ed t ime period, or otherwi s e a convent ional engine res tart us i ng theignit ion swi tch will be requi red.For addit ional informat ion, refer t o: Starti ng Sys t em (303-06C Starti ng Syst em - TD4 2.2L Di es el, Vehicles Bui lt From:01-03-2009, Descripti on and Operat ion).
WHEEL SPEED SENSORS

SymptomAction
- Pos it ive readi ngs of bet ween 10-20%: check for air leaks i n air i nt ake s ys t em- Negati ve readings of between 10-20%: check for over fuell ing e.g. leaki ngi njectors , high fuel pres sure- Readings above 20%: check for DTCs and refer t o DTC Index.REFER t o: El ect ronic Engi ne Cont rol s (303-14A El ect roni c Engi ne Cont rol s - I6 3.2LPet rol, Di agnos is and Tes ti ng).Carry out a vacuum gauge check. Refer to component t es ts i n t his s ecti on.
Oi l cons umpti onCarry out oil l eak check fol lowed by an oi l cons umpt ion tes t. Refer t o t he componentt est s i n t hi s s ect ionIf oil cons umpt ion i s exces si ve:Check the integrit y of the engine breat her sys t emCarry out general engi ne checks :- Compress ion tes t. Refer t o component t es ts i n t his s ect ion.- Val ve cl earances .REFER t o: Val ve Clearance Check (303-01A Engine - I6 3.2L Pet rol , GeneralProcedures ).- Spark pl ug condi ti on and col or
Nois eRefer t o t he Speci al Servi ce Mess ages on t he Electroni c Product Q ual it y Report (EPQR)s ys tem for s ound fi les . If t he s ympt om does NOT compare t o any of the s ound files ,contact Deal er Technical Support (DTS).
Component Tests
Engine Oil Leaks
• NOTE: Before ins t al li ng new gasket s or oil s eal s, make sure t hat t he faul t is cl early es t abl is hed.
If the oi l l eak cannot be ident ifi ed clearl y by a vi sual ins pect ion, carry out an Ult raviolet t est :
Fluorescent Oil Additive Method
1. Clean t he engi ne wit h a sui table cl eani ng fl uid (brake cleaner).1.
2. Drai n the engi ne oil and refil l wit h recommended oil , premixed wi th Dies el Engine Oil Dye or equi val ent . Us e aminimum 14.8 ml (0.5 ounce) t o a maxi mum 29.6 ml (1 ounce) of fl uores cent addit ive to all engines. If oil i s notpremixed, fl uorescent addi ti ve mus t fi rs t be added to the crankcas e.
2.
3. Run engi ne for 15 minutes . Stop the engine and i nspect all s eal and gas ket areas for leaks us ing a 12 Vol tMas t er UV Diagnost ic Ins pect ion Ki t or equivalent . A clear bri ght yell ow or orange area wil l i dent ify l eak. Forext remely smal l leaks, s everal hours may be required for t he leak t o appear.
3.
4. As neces s ary, pres surize t he main oil gallery s yst em t o l ocat e leaks due t o incorrect ly sealed, loos e or cockedpl ugs . If the flywheel bol ts l eak oil, l ook for s ealer on t he threads .4.
5. Repai r al l leaks as neces s ary.5.
Compression Test
General Remarks
• NOTE: Removing fuses and di sconnect ing elect rical components may caus e t he Engine Control Modul e (ECM) t o l ogDiagnost ic Troubl e Codes (DTCs ). Aft er t he meas urements have been carried out , DTCs should be cl eared from memory byconnecti ng to the Manufact urer Approved Diagnos t ic Sys tem.
• NOTE: Only check the compress ion pres sure wit h t he valves s et to the pres cri bed clearance (i f thi s can be adjus ted).
The compres si on pres s ure s hould be checked wi th the engine at operat ing temperat ure.
Check the Comp ression Pressure
W ARNING: Move gear s elector lever to 'P' pos i ti on. Fail ure t o follow thi s ins t ructi on may res ult i n pers onal injury.
1. Remove the fuel pump rel ay.1.
2. Start the engine - the engine wi ll s t art, run for a few seconds then s t op.2.
3. Remove the s park pl ugs.3.
4. Ins t al l the compres s ion t es ter.4.
5. Ins t al l an auxi li ary s tarter s wit ch in the st art ing circui t. W it h t he ignit ion swi tch O FF, us ing t he auxi li ary s t arters wi tch, crank the engine a mi ni mum of five compres s ion st rokes and record the hi ghest reading. Not e theapproximat e number of compress i on s trokes requi red t o obt ai n t he highest readi ng.
5.
6. Repeat t he tes t on each cyl inder, cranking t he engine approximat ely t he s ame number of compress i on st rokes .6.
7. Ins t al l the removed components in reverse order, obs erving t he s peci fi ed ti ght ening t orques.7.
8. Clear all DTCs from the ECM.8.

Publi s hed: 11-May-2011
Starting System - TD4 2.2L Diesel, Vehicles Built From: 01-03-2009 -
Starting System
Des cript ion and Operat ion
STOP/START SYSTEM
COMPONENT LOCATION
Stop/St art s ys tem component locati on
ItemPart NumberDescription
1-Volt age quali ty modul e2-Batt ery moni toring s yst em modul e
3-Absorpt ion gl ass mat batt ery
4-Gear neut ral s ens or5-Starter mot or
6-Auxi li ary cool ant pump
7-Linear cl ut ch s ens or8-Brake vacuum s ens or
9-Stop/St art s wi tch
OVERVIEW

The TD4_e int roduces t he first i ntell igent ‘St op/Start’ s yst em i nto a Land Rover vehi cle. The s ys t em automat icall y s hut sdown and res t art s the vehicl e’s engi ne when t he appropriat e condi ti ons are s at is fi ed. This reduces t he amount of ti me t heengi ne s pends i dling, t hereby improvi ng fuel economy and reduci ng emis s ions . Thi s is advantageous for vehi cles whichs pend si gni fi cant amounts of t ime in congest ed t raffi c, for example:
wait ing at t raffi c li ght s ,frequent ly comi ng to a halt i n traffic jams .
Gains from thi s t echnology in comparis on to a previous TD4 vehicle wit hout St op/St art, and bas ed on a legal ly defined‘European Drive Cycl e’ are t ypi cal ly i n t he range of:
CO2 emi ss i ons , reduced by almos t 8 percent over t he s t andard EU4 dri ve cycle, t hi s equat es t o a reduct ion of
15g/km.Fuel consumpt ion, improved by 3.8 mil es per gall on; or 0.6 li ters for every 62 mil es / 100 kil omet ers .
• NOTE: Fuel economy and emis s ion reduct ion wi ll vary on drivi ng st yle and traffi c conges ti on.
Int roduced as s tandard i n t he dies el vehicle wit h manual trans mi s si on, t he St op/Start sys tem is aut omati cal ly act ivatedeach ti me an i gni ti on cycl e occurs . However, t he driver can deact ivate the s ys tem by pres si ng t he ‘Eco’ s wi tch i n the fas ci a.
Eco Stop/St art Swi tch
• NOTE: In addi ti on t o t he Stop/St art s yst em the ‘Eco’ s wit ch als o operates the Gear Shift Indicator s yst em.
For addit ional informat ion, refer t o: Ins t rument Clus ter (413-01 Inst rument Cl us t er, Des cript ion and Operat ion).
The LED t el l-tal e li ght in t he Eco s wit ch is i ll uminated to inform t he dri ver t hat the St op/St art s yst em i s funct ioningcorrect ly. The tel l-tale li ght wi ll exti ngui sh if:
The dri ver s wi tches off t he Stop/St art s ys tem.Eit her HDC (hi ll decent cont rol ) or TR (terrain res pons e) is act ive.There i s a s ys tem fault ; for addit ional informati on, refer t o t he Sys t em Fault s ect ion bel ow.
New s oft ware added t o t he ECM (engine cont rol module) controls t he operati on of the St op/St art s yst em where i n addi ti ont o it s own dedicated component s t he Stop/Start sys tem encompas s es many other vehi cl e s yst ems . Complex t echnologyint erconnects thes e s ys t ems and ens ures all t he neces s ary condi ti ons are s ati s fi ed by monit oring, among ot hers :
posi ti on of the cl ut ch pedal ,gear s elect or pos it ionroad s peeds tat e of vit al vehicle sys temsenvi ronmental condi ti ons .
If al l neces sary condi ti ons are s ati sfied the St op/Start s ys t em wi ll automat icall y stop t he engine i f:
t he vehi cl e is st ati onary,t he trans mi s si on is in neutral,t he cl utch pedal i s ful ly releas ed.
The dri ver wi ll be not ifi ed t hat t he engine i s s hut down by t he ‘Eco’ i con bei ng il lumi nat ed in the i nst rument clus t er. Ot herwarni ngs normall y ass ociat ed wit h an engine s hutdown, for example the i gni ti on and low oil pres s ure i ndi cat ors ares uppress ed s o wi ll not il lumi nat e duri ng an engine s hutdown i n a St op/Start cycle.

Eco Stop/St art Indicat or
The engi ne wi ll automat ically res tart when the driver depress es t he clut ch, ready for a gear t o be sel ect ed. The ‘Eco’ iconin the i nst rument clus t er will exti ngui s h at thi s point.
If sys tem condi ti ons are not approved by the ECM the St op/St art s yst em will not behave as expect ed, exampl es of thisare:
Syst em i nhibit : the engi ne wil l conti nue running even t hough t he vehicle i s s tat ionary wit h t he trans mi s si on inneut ral and t he clut ch pedal ful ly released.Syst em override: t he engi ne has been st opped by the St op/St art s ys t em but condi ti ons have s i nce changed, t hi swil l act ivate an earl y aut omat ic engine rest art .
Thes e intervent ions are to ens ure the St op/St art s ys t em does not impact on:
vehi cl e and occupant s afety,dri ver requi rement s,occupant comfort ,vehi cl e ‘on-road’ and ‘off-road’ capabi lit ies .
Alt hough the mai n cont rol l ogi c for St op/Start operati on res ides i n t he ECM; the CJB (cent ral juncti on box) has al so beenupgraded wit h new s oftware to communi cat e engine s hutdown i nhibit s t o t he ECM. In s ome ins tances , dependi ng on thereas on for t he s yst em intervent ion t he dri ver wi ll be not ified via the mes s age Center t he reas on for t he int ervent ion. Foraddi ti onal i nformat ion, refer to mes sage Center t able below.
Syst em condit ions t hat i nfluence t he operati on of the St op/Start s ys t em are dis cus s ed further i n the ‘Stop Inhibit ors , St artIni ti ators and Start Inhibi tors ’ s ect ion, below.
W ARNING: To avoi d injury when performing repai r work on t he vehicle al ways di s abl e the Stop/St art s ys tem bypres s ing t he ‘ECO’ butt on, ens ure that ‘ECO STOP/START OFF’ is di s pl ayed in t he mes sage Cent er and the ECO tel l-taleli ght in t he s wit ch is ext inguis hed.
MESSAGE CENTER
A number of dri ver i nformat ion mess ages have been i ntroduced t o inform the driver of the St op/St art s ys t em’s s t atus ofoperati on.
The ins t rument clus ter receives mes s age Cent er dat a from the ECM via t he CJB over t he medi um s peed CAN (cont roll erarea net work) bus. The CJB generat es this dat a bas ed on medium and high s peed CAN bus i nput s and hardwired i nput sreceived from various s yst em control modul es. Software cont ained wi thin the ins trument cl us t er convert s the dat a from theCJB int o dis play mes s ages for t he dri ver.
Stop/Start Messages
MessageOther WarningsReasonAction
ECO STOP/STARTONTell-t al e l ight in theEco s wit chil lumi nat ed.
The s ys tem has been swi tched off and t hen lat ers wi tched on wi thin the s ame ignit ion cycl e.If required, pres s the Ecos wi tch t o deact ivat e theSt op/St art s ys t em.ECO STOP/STARTOFFTell-t al e l ight in theEco s wit chexti nguis hed.
The Eco s wit ch has been pres sed.If required, pres s the Ecos wi tch t o react ivate theSt op/St art s ys t em.
ECO STOP/STARTUNAVAILABLETell-t al e l ight in theEco s wit chexti nguis hed.
Ei ther, HDC (hi ll decent cont rol ) or TR (t errainrespons e) is acti ve.Des elect HDC or TR i ft errain condit ions permi t.
SELECT NEUTRALTO RESTARTNoneThe engine has been s hutdown i n a St op/Startcycl e and t he dri ver has engaged a gear wi thoutdepres s ing t he clut ch.
Depres s cl ut ch and s electneut ral.
RESTART REQ UIREDPRESS CLUTCHNoneW hen an engi ne res t art i s required in a Stop/St artcycl e but t he driver’s l ocati on is unknown. Eit hert he dri ver’s door or s afety bel t is unl at ched.
Depres s cl ut ch.
ECO STOP/STARTFAULTTell-t al e l ight in theEco s wit chexti nguis hed.
St op/Start not avail able due t o s yst em ors ub-s ys tem fai lure.Connect Land Roverapproved diagnos ti cequipment t o diagnosefault .• NOTE: ‘SELECT NEUTRAL TO RESTART’ can appear if t he dri ver i s res t ing t heir hand on t he gear l ever wi th enoughpres s ure t o move t he t rans mis s ion out of t he neut ral wi ndow wit hout engagi ng a gear.

• NOTE: If aft er an uns ucces sful aut omati c res t art t he dri ver i s request ed t o res t art t he engi ne for example, by depres s ingt he cl utch. Thi s acti on has to be compl eted wi thi n 50 s econds , ot herwi se the St op/Start s yst em will deact ivat e and aconventi onal s tart wil l be required.
REFINEMENT AND DURABILITY
Engi ne operati ng refinement has been maint ai ned and in some cas es refined t o ens ure t he vehicle’s occupant s wit ness analmos t s eamles s operati on wi th regard t o engine s hutdown and rest art wit hi n a St op/St art cycle.
To reduce engine s hake when the engine is s hutt ing-down a revis ed t hrot tl e clos ing st rat egy i s i nt roduced, whi ch rampsdown t he fuel inject ion i n a more s moot h and cont rol led manner. At t he s ame t ime the generat or is t urned-off to reduceload on the engine.
ECM s oft ware changes and revis ed engine cali brati on further aid a s moother engi ne s hut down. Furthermore t he opti mizedengi ne mounti ng s trategy and t uni ng as si st s i n reducing engine s hake on engine s tart-up.
Component s direct ly i nvol ved wit h engine s tart-up and s hut-down have been ei ther upgraded or replaced to wit hst and t heincreas ed frequency of Stop/St art cycl es over t he l ifet ime of the vehicle. These enhanced and more robust component s aredis cus s ed i n thi s s ect ion.
CAUTION: To mai ntain the correct operat ion of t he St op/Start sys t em care must be taken when repl acingcomponents , t hat onl y approved parts are fit ted as some components from earl ier vehicl es wil l fi t the TD4_e.
Starter Motor
To i mprove durabil it y due t o the increased st art -demands on t he s tarter mot or a number of i mprovements have beenmade:
Greas e s eals have been upgraded.A hard weari ng copper-tungs ten contact mat erial has been int roduced t o i mprove wear res i st ance wit hi n t he s tarters olenoi d.The pinion gear i s manufactured from a harder grade of st eel.
Flywheel Ring G ear
Due t o t he increas ed s tart -demands , the flywheel ri ng gear i s manufactured from a harder grade of st eel wit h 25% morecarbon cont ent which increas es it s durabil it y.
Dual Mass Flywheel
As wi th previ ous dies el powered vehicl es a dual -mass flywheel is fit ted to ens ure refi nement when the engine i s beingeit her s t art ed, s t opped or runni ng at low speeds.
To provide an even greater level of refi nement due t o t he i ncreas ed s tart and s top demands , a new fri ct ion di sc has beendevel oped for the TD4_e dual-mas s fl ywheel . The new frict ion dis c whi ch is able to wit hst and s even-t imes the press ure ofa s t andard dis c is manufact ured from polyetheret herketone als o known as PEEK.
PEEK is a s emi-cryst all ine t hermoplas ti c, whi ch is res is tant t o both organi c and aqueous environment s . It has ahigh-melt ing point making it res i st ant to thermal degradati on. It i s als o one of t he few pl ast ics compati ble wi th ult ra-hi ghvacuum appl icat ions and i s t ypi cal ly us ed in bearings , pi s ton part s and pumps .
Absorption Glass Mat Battery

Convent ional bat teries los e t heir capacit y t o hold charge overt ime as t hei r int ernal l ead plat es st eadi ly det eri orate wit ht he cont inual vi brati on and eros ion t hat occurs wit h normal us e. The rate of det eri orati on depends on a number of fact ors ,including charge and di s charge cycling rat es . Therefore t he ext reme power cons umpti on of a Stop/St art s ys tem would havea det riment al effect on t he li fe-s pan of t his t ype of bat t ery.
To count eract the deeper dis charge and recharge cycl es of a Stop/St art s ys tem, a hi gh-performance batt ery bas ed onAbsorpti on Glas s Mat t echnology has been developed t o reduce batt ery det eri orati on caus ed by exces s ive us age. Thebatt ery owes i ts succes s t o t he ‘abs orbent glas s mat’ whi ch is a fi ne fi breglas s mat compres sed bet ween t he lead plat es.The ‘abs orbent gl ass mat’ als o abs orbs t he batt ery acid, enabling a more efficient us e of the cell ’s volume.
W hi le t he ‘abs orbent glas s mat ’ permit s t he electrol yte to funct ion normall y, i t also provides mechanical s upport for t helead pl at es , therefore reducing vi brat ion and s ubsequent degradat ion. Thi s t echnology s ubs t ant ial ly i ncreas es t he effect ivecharge and dis charge li fe of t he batt ery. The batt ery al s o has an extremely l ow int ernal res is t ance, res ult ing i n a quickerreacti on between acid and pl ate material.
Absorpti on glas s mat batt ery t echnology offers s everal advant ages :
The batt ery remains complet ely s pil l and leak proof due to the abs orpt ion of t he fi breglas s mat .In freezi ng condit ions , expanding flui d is unable to caus e any damage as the pl ates are packed i n fibreglas s mat s ;cons equent ly t here is virtual ly no pl at e movement .Vibrat ion or s hock does not damage t he batt ery.As electrolyt e is contai ned through t he acid i n t he mat , there is no need for bat t ery mai nt enance.
The batt ery's capaci ty is 80Ah, meani ng t he bat t ery i s theoret icall y capable of s upplying an 80 amp current for one hour. At ypi cal engi ne res t art wi ll draw a very hi gh current for a fract ion of a second, s o wi ll have very l it tl e impact on t he batt ery'st ot al st ate of charge. An engine res tart may typicall y cons ume about 0.001% of a new batt ery's full -charge capaci ty.
If a new batt ery is fit ted t o t he vehicle, the BMS (bat tery monit ori ng s ys t em) module wi ll requi re recal ibrat ing t o regi s tert he greater charge holding capaci ty of the bat tery, t his i s performed us ing Land Rover approved di agnos ti c equi pment. Ifdiagnost ic equipment i s not avail able t he BMS modul e wil l recalibrate aut omati cal ly however, thi s coul d t ake 48 hours t ocomplete depending on vehicle usage. The Stop/St art s ys tem wil l not funct ion correctly unt il t he BMS module isrecali brated.
If the BMS modul e i s replaced t he module wi ll recali brat e automat ically; for addit ional informat ion refer to the Bat teryMonit oring Sys t em s ect ion, below.
CONTROL DIAGRAM
New s oft ware added t o t he ECM controls t he operat ion of t he Stop/St art s yst em where i n addi ti on t o it s own dedicatedcomponents the St op/St art s ys t em encompas s es many ot her vehicle sys tems . Complex technol ogy i nterconnect s t hes es ys t ems and many of t he inputs as s oci ated wit h the St op/St art s yst em are relayed to the ECM and trans mi tt ed via theCJB, whi ch has al s o been upgraded wit h new s oft ware. The control l ogi c for i nhi bit ing an engine shut down during aStart/Stop cycle resi des in t he CJB. The CJB al s o act s as a gat eway rel ayi ng thi s informat ion t o t he ECM over the medi umand high-s peed CAN bus net works.
Eight vehi cl e harnes s es have been modi fied to accommodate t he St op/Start sys t em.
Stop/St art Cont rol Diagram
• NOTE: A = Hardwi red; D = Hi gh Speed CAN bus ; N = Medium Speed CAN bus; O = LIN bus ; AC = Di agnos ti c Link.